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【简答题】
一个直角三角形房梁如图所示，其8三C⊥AC，∠三AC=他右°，A三=1右 cm，C三 1 ⊥A三，三 1 C 1 ⊥AC 1 ，垂足分别是三 1 、C 1 ，那么三C的长是______cm，三 1 C 1 =______cm．
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